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Hyperspectral image waveband selecting method and device

A hyperspectral image and band selection technology, applied in the field of image processing, can solve the problems of slow implementation speed and low band selection efficiency of hyperspectral image band selection method

Active Publication Date: 2013-08-28
CENT FOR EARTH OBSERVATION & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that in the existing hyperspectral image band selection method, the method for calculating the degree of band correlation (such as spectral angular distance, Euclidean distance, mutual information, etc.) requires all the pixels of the hyperspectral image Participating in calculations, for hyperspectral images with a large number of pixels, the existing hyperspectral image band selection methods are slow to achieve, and the band selection efficiency is low

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[0087] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0088] see figure 1 , figure 1 A flow chart of a hyperspectral image band selection method provided in an embodiment of the present application, including:

[0089] Step S101: Sampling the first hyperspectral image and acquiring a second hyperspectral image, the size of the second hyperspectral image is smaller than the size of the first hyperspectral image;

[0090] The first hyperspectral image is the hyperspectral image for which band selection is to be perfor...

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Abstract

The invention discloses a hyperspectral image waveband selecting method. According to the method, the size of a hyperspectral image is shrunk in advance; when the relevancy of wavebands is calculated, part of image elements of the image of each waveband of the hyperspectral image participate in calculation of the relevancy; and waveband selection is performed only through the relevancy of the images of the wavebands, and the information amount of the image of each waveband does not need to be calculated. Therefore, by virtue of the hyperspectral image waveband selecting method provided by the embodiment of the invention, the calculation amount is small and the hyperspectral image waveband selecting efficiency is improved. The embodiment of the invention also provides a hyperspectral image waveband selecting device.

Description

technical field [0001] The present invention relates to the technical field of image processing, and more specifically, to a hyperspectral image band selection method and device. Background technique [0002] With the development of hyperspectral remote sensing technology and imaging spectrometer, hyperspectral images have been more and more widely used. Since hyperspectral remote sensing can obtain spectral information of ground objects in narrow and continuous bands, there is often a strong correlation between adjacent bands of hyperspectral images, which not only brings a lot of redundant information, but also increases the The computational load of image processing also reduces the accuracy of hyperspectral image classification and target detection, which affects the further application of hyperspectral images. Therefore, how to reduce the number of bands involved in information extraction on the basis of retaining the rich information of hyperspectral data to the great...

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Application Information

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IPC IPC(8): G06K9/66
Inventor 张兵高连如孙旭杨斌倪丽
Owner CENT FOR EARTH OBSERVATION & DIGITAL EARTH CHINESE ACADEMY OF SCI
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